Posterior Maxillary Segmental Osteotomy Research Articles

Camouflage treatment of posterior bite collapse in a patient with skeletal asymmetry by using posterior maxillary segmental osteotomy

Orthodontic treatment of posterior bite collapse due to early loss of molars and the consequent drift of adjacent teeth is complicated. When the posterior bite collapse occurs in patients with facial asymmetry, both transverse and vertical compensation are necessary for camouflage orthodontic treatment. In such cases, posterior maxillary segmental osteotomy (PMSO) can be an effective alternative procedure that simplifies the orthodontic treatment and shows long-term stability through dental compensation within the alveolar bone housing. This case report aimed to describe the orthodontic treatment of maxillary occlusal plane canting caused by severely extruded maxillary teeth in a patient with skeletal facial asymmetry that was corrected with PMSO along with protraction of the lower second molar to replace the space of the extracted first molar. The treatment duration was 18 months, and stable results were obtained after 2 years of retention.

Treatment of anterior open bite by posterior maxillary segmental osteotomy and miniplates: a case report

BackgroundAnterior open bite is a challenging malocclusion to correct orthodontic treatment. Anterior open bite associated with over-erupted posterior teeth and long lower facial height should be treated by reduction of posterior dimension for esthetic results. Although the possibility of orthodontic treatment of an anterior open bite has increased with the introduction of skeletal anchorage, there are still cases requiring surgery for various reasons.Case presentationThis case report covers an anterior open bite of a 25-year-old man successfully treated with the posterior maxillary segmental osteotomy (PMSO) and miniplates. After the pre-surgical orthodontic treatment, the PMSO between canines and first premolars was performed under local anesthesia and miniplates were placed on the zygomatic buttress. As a result of 28 months of treatment, an impaction amount of 3.5 mm was obtained in the maxillary posterior teeth, and the facial esthetics improved at rest and smile.ConclusionThe impaction of the posterior dentoalveolar segment using the PMSO can be a good treatment option in patients with anterior open bite showing long lower facial height.

Posterior maxillary segmental osteotomy for prosthodontic rehabilitation of vertically excess maxilla -a review

PurposeThe purpose of this systematic review was to analyze the literature of the various surgical options available for the correction posterior maxillary alveolar ridge excess without going for radical approaches. It also analyzed the effectiveness of posterior maxillary segmental osteotomy in prosthetic rehabilitation in terms of stability, success rates, function, occlusion, aesthetics and long term postoperative complications. Study selectionA systematic search of Medline/Pubmed and Web of Science databases of English articles published till December 2017 for the treatment of vertical excess in the posterior maxilla for prosthetic reasons was performed. A total of 37 articles met the inclusion criteria. ResultsPosterior maxillary segmental osteotomy (PMSO) was performed as a single stage procedure in 23 cases with minimal post- operative discomfort in all cases. The amount of superior positioning of the osteotomised maxilla ranged between 4 mm to 9 mm which provides sufficient space for prosthodontic rehabilitation. ConclusionsPMSO is fairly competent in treating vertical ridge excess of posterior maxilla, makes space for prosthesis and is associated with fewer postoperative problems when a multidisciplinary team approach is put into service.

Posterior maxillary segmental osteotomy for management of supraerupted teeth

Posterior maxillary segmental osteotomy for management of supraerupted teeth

Posterior maxillary segmental osteotomy for the implant reconstruction of a vertically deficient ridge: A 3-year clinical report

A vertically deficient posterior maxillary edentulous ridge in conjunction with sinus pneumatization or extensive horizontal bone resorption presents significant challenges for implant placement and restoration with an implant-supported fixed prosthesis. Various surgical techniques have been reported for the reconstruction of the vertically deficient posterior maxilla: guided bone regeneration, sinus elevation, block and/or particulate grafting with barrier membranes, and distraction osteogenesis. This clinical report describes the technique, the management of intrasurgical complications, and the 3-year follow-up results of augmenting the vertically deficient posterior maxilla with a segmental osteotomy prior to rehabilitation with an implant-supported fixed prosthesis.

Gaining vertical interarch space for implant placement: The surgical protocol - Series of five cases

Purpose of the Study: Compromised inter-arch space stand as a difficult clinical situation for placement of implants in opposite arch. This study aims towards finding out efficacy of posterior maxillary segmental osteotomy (PMSO) in providing adequate interarch space. Materials and Methods: The study comprised of five patients with supraerrupted maxillary posterior teeth. All patients underwent PMSO under GA. Postoperative interarch distance measured and compared with the preoperative value. Main results: On an average, about 4 mm of clearance was achieved from the existing pre-operative clearance, which facilitated restoration of dentition in the opposing arch. The results were stable without complications over 16-18 months post-operatively. Conclusion: PMSO is a simple quick alternative technique and can be combined with implant placement and a successful technique for increasing the interocclusal clearance, and thereby facilitating restoration of the dentition in the opposite arch.

Posterior maxillary segmental osteotomy for restoring the mandible with dental implants: A clinical report

Posterior segmental collapse causes narrowing of interarch space and prevents adequate restoration in the posterior quadrant. Posterior maxillary segmental osteotomy (PMSO) is an alternative option that enables prosthodontic restoration with an implant-supported fixed partial denture. The following clinical report describes prosthodontic rehabilitation with fixed prostheses after a posterior maxillary segmental osteotomy for a patient with a partially edentulous mandible.

Posterior maxillary segmental osteotomy for mandibular implants placement: case report

The loss of mandibular molars can result in a maxillary dentoalveolar extrusion, leading to an insufficient interarch space. In severe cases, this space must be regained before the prosthetic reconstruction of the opposite edentulous area. The posterior maxillary segmental osteotomy (PMSO) is a simple but precision technique to manage this problem; without which one can achieve a good surgical outcome but a poor final occlusion. The purpose of this paper was to present a case of PMSO for mandibular implant placement and to discuss the important steps.

A Posterior Maxillary Excess Treated by Unilateral Posterior Maxillary Segmental Osteotomy: Report of a Case

A Posterior Maxillary Excess Treated by Unilateral Posterior Maxillary Segmental Osteotomy: Report of a Case

Le Fort I Osteotomy and Posterior Maxillary Segmental Osteotomy for Correction of Malunioned Maxilla

This is a case report of correction of malunioned maxilla after traffic accident by Le Fort I osteotomy and posterior segmental osteotomy. By this procedure, authors obtained the following results. 1. The malinioned maxilla after traffic accident which had anterior crossbite, posterior open bite and scissor's bite were corrected by Le Fort I osteotomy and posterior segmental osteotomy. 2. No postoperative infection and specific complication were seen in this case. 3. Postoperative intermaxillary fixation was maintained for 8 weeks. And then, the patient could open his mouth in normal range after a week of intermaxillary fixation removal. 4. For rigid fixation and reducing relapse, the osteotomized maxilla was fixed with miniplates.